CatIt Senses Play CircuitAppeals to your cat's senses of sight, sound and touch which are key when hunting prey Specially designed to entice, engage and entertain your cat while appealing to his natural hunting instincts Peek a boo track: Design allows cat to see, chase and swat the ball Grey and green ball: Specifically designed to attract cat's attention Ensure that the track pieces are securely clipped together and ensuring the two halves of the ball are properly stuck